494639667959 has 2 divisors, whose sum is σ = 494639667960. Its totient is φ = 494639667958.

The previous prime is 494639667947. The next prime is 494639667989. The reversal of 494639667959 is 959766936494.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 494639667959 - 2⁴ = 494639667943 is a prime.

It is a super-2 number, since 2×494639667959² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 494639667959.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (494639667989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247319833979 + 247319833980.

It is an arithmetic number, because the mean of its divisors is an integer number (247319833980).

Almost surely, 2^494639667959 is an apocalyptic number.

494639667959 is a deficient number, since it is larger than the sum of its proper divisors (1).

494639667959 is an equidigital number, since it uses as much as digits as its factorization.

494639667959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2380855680, while the sum is 77.

The spelling of 494639667959 in words is "four hundred ninety-four billion, six hundred thirty-nine million, six hundred sixty-seven thousand, nine hundred fifty-nine".